382 A FLORA OF MANILA 
Genera 44, species about 1,000, in all parts of the world, but more 
abundant in tropical and subtropical regions, 17 genera and about 50 species 
in the Philippines. 
1. Styles 2, free, each 2-branched; slender hairy herbs with subrotate 
FEO WOE sigs eran earl at 1. Evolvulus 
1. Styles united, the stigmas 1 or 2; flowers campanulate, salver-shaped 
or urn-shaped. , 
2. Corolla urn-shaped, the flowers in dense, axillary, subcapitate cymes. 
2. Lepistemon 
2. Corolla salver-shaped. 
3. Flowers small, bright-red, the limb narrow........ EER, 38. Quamoclit 
3. Flowers very large, white, the limb broad.................... 4. Calonyction 
2. Corolla campanulate or funnel-shaped. 
3. Sepals much enlarged in fruit, often fleshy, quite enclosing the 
capsule. 
4. Stems 4-winged or flowers yellow; capsule dehiscent.. 5. Operculina 
4. Stems terete; capsule indehiscent........................-.....- 6. Stictocardia 
3. Sepals not or but slightly enlarged in fruit. 
4, Fruit indehiscent. 
5. Leaves densely silky-pubescent beneath, with white, shining 
crt iene Pern T mie Be ety MS bat 7. Argyreia 
5. Leaves glabrous or pubescent, not white-silky-hairy.... 8. Rivea 
4, Fruit dehiscent or the walls fragile and soon breaking up. 
5. Ovary. -l-cellied spe. a ek ee eg ce 9. Hewittia 
5. Ovary 2- to 4-celled. 
6. Corolla-tube with 5 vertical bands of 5 parallel lines each. 
. 10. Merremia 
6. Corolla-tube with 5 vertical bands of 2 lines each.. 11. Ipomoea 
1. EVOLVULUS Linnaets 
Slender, spreading herbs with small, entire leaves. Flowers small, axil- 
lary, solitary, or 2 or 3 on each peduncle. Sepals unequal. Corolla funnel- 
shaped, the limb 5-parted. Stamens included or exserted. Ovary 2- or 
1-celled, 4-ovuled; styles 2, separate from the base, each cleft into 2 
stigmas. Capsules globose, 4- or 2-valved, usually 4-seeded. 
Species about 70, in all tropical and subtropical regions, mostly in tropical 
America, 1 in the Philippines. (Latin “to unroll,” in reference to their non- 
twining habit.) 
1. E. alsinoides L. 
A very slender, more or less branched, spreading or ascending, usually 
very hairy herb, the stems 20 to 70 em long, not twining. Leaves variable, 
hary, 0.5 to cm long, ovate elliptic, or oblong. Peduncles slender, longer 
than the leaves. Flowers pale-blue or nearly white, 6 to 8 mm in diameter. 
In open dry grass lands near Fort McKinley, La Loma, etc., fl. Sept.—Feb. ; 
widely distributed and possibly introduced in the Philippines. Cosmopolitan 
in tropical and subtropical regions. 
2. LEPISTEMON Blume 
Twining herbs with cordate, entire or slightly lobed, ovate, pubescent 
leaves. Flowers in very dense, axillary, subcapitate cymes, the bracts 
narrow, deciduous. Sepals 5, subequal, hairy, acute or obtuse. Corolla 
small, pale-yellow or nearly white, the tube narrowed and short-cylindric 
